Metallic piston-packing.



C. E. WHITEVIAN &1. R. W. GREGG.

METALLIC PISTON PACKING.

APPLICATION min nEc.3.1914.

I faces 7vof the side rings being less than the outer face 6 .of the` middle ring 5,-the

faces 7 Wear away more rapidly than the f face 6, hence the rings 4 expand proportionately more rapidly than theV ring 5 and 'the bevel faces 9 riding upon the bevel faces ll-oausea sepa-ration of the rings 4 with the resultthat their outersides 8 are held I v'pressed into close engagement with the side ,walls of the groove 3, thereby preventing V:any loss -of `compresslon or power or any lateral play of the packing in the groove 3. y While the packing is designed chiely for the pistons of internal combustion engines it is to be understood that it may be applied to plungers orvother moving parts requlring self-expansible metallic packing Without requiring the use of extraneous means t'o l cause an expansion ofthe packing to main- It is to be understoodtain a close joint. that the rings or members comprising the ypacking are slit or open to admit of expangsion, the latter being dueto the inherent j elasticity of the rings.

When adapting the invention to specific lrequlrements it is to be understood that various changes vin the form, construction and minor details may be resorted to'without departing from the essential features of the invention as embodiedin the claim.

yin cross section and having its Having thus described the invention, What is claimed as new is A metallic piston packing comprising eX pansible side rings and anexpansible intermediate ring, the side 'rings having their outer lateral faces located in parallel planes and portions of their inner lateral faces disposed parallel with the outer lateral vfaces and other portions of their inner -ing .of a Width vgreater than the combined Widths of the outer circumferential surfaces of the side rings; the side and intermediate rings having a tendency to expand diametrically.

In testimony whereof We aiiiX our signatures in presence of two Witnesses. i

CLARENCE E. WHITEMAN. [L- 8.] JAMES R. W. GREGG. V[L- sl Witnesses: t

W. E. Crews, B. R. MCCABE. 

